SBLM2500 Ind 176

OPTIONAL
GE Industrial AeroDerivative
Gas Turbines
SERVICE BULLETIN LM2500-IND-0176
August 28, 2003
GE PROPRIETARY INFORMATION
The information contained in this document is GE proprietary information and is disclosed in

confidence. It is the property of GE and shall not be used, disclosed to others, or reproduced
without the express written consent of GE, including, but without limitation, it is not to be used
in the creation, manufacture, development, or derivation of any repairs, modifications, spare
parts, designs, or configuration changes or to obtain FAA or any government or regulatory
approval to do so. If consent is given for reproduction in whole or in part, this notice and the
notice set forth on each page of this document shall appear in any such reproduction in whole
or in part. The information contained in this document may also be controlled by U.S. export
control laws. Unauthorized export or re-export is prohibited.
Copyright (2003) General Electric Company, U.S.A.
SUBJECT: Introduction of EABAL Software Change (LM2500+ DLE Models)
I. PLANNING INFORMATION
A. Effectivity
(1) PRODUCTS: LM2500+ DLE Models
(2) ENGINE SERIAL NUMBERS:
LM2500+ gas turbines, serial numbers 559-051, 559-052, 559-101 through

559-109, and 559-113, are affected by this Service Bulletin.
LM2500+ gas generators, serial numbers 636-050, 636-051, 636-101 through

636-106, 642-102 through 642-107, 642-110 through 642-113, 642-115,
642-116, 642-118 through 642-135, and 642-137 through 642-151, are
affected by this Service Bulletin.
B. Reason
(1) Objective:
The primary objective of this software update is to provide newly available

reliability/availability/maintainability (RAM) related fixes and features
as-well-as ease of use functionality to the LM2500+ DLE fleet.
(2) Condition/Event(s):
DLE engines across the customer base have experienced a wide range of
events from trips related to high combustor acoustics or the loss of a flame
sensor to operability issues related to the calculation of fuel compressibility.
The development of advanced algorithms has provided the opportunity to
improve on engine RAM. Advancements in software development tools
has provided productivity enhancements to control software developers
and end users.
OPTIONAL
PAGE 1 of 5
LM2500-IND-0176
August 28, 2003
(3) Cause:
This product has been developed as part of GE’s ongoing efforts to

continuously improve engine operation with the integration of new technology
and to address customer requested enhancements.
(4) Improvement:
The S3 block change for Woodward and GE Mark V and Mark VI controlled
engines includes EABAL logic for improved combustor acoustics protection,
a blowout detection fix to avoid loss of blowout protection after load drops,
a new algorithm to account for fuel compressibility effects, and CDP bleed
valve freeze logic to help prevent premature failure of bleed valve actuator
seals due to system noise.
C. Description
This Service Bulletin is to introduce the EABAL software change in +DLE Models.
D. Compliance
Category: Optional (O) Level: Field (F) Timing Code: 7
GE recommends this Service Bulletin be accomplished at the customer’s option.
E. Manpower
Approximately 1 man-hour is required to accomplish this Service Bulletin.
F. Tooling
No special tools are required.
PAGE 2 of 5
GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.

LM2500-IND-0176
August 28, 2003
G. Material Requirements
(1) None.
This Service Bulletin involves a software change only. For additional

information contact your GE Energy Services Account Manager or
GE Customer Satisfaction manager at the address below:
GE Marine & Industrial Aeroderivative Gas Turbines

MD S-133
One Neumann Way
P.O. Box 156301
Cincinnati, OH 45215-6301
U.S.A.
Attn: GE Customer Account Manager
H. Material Configuration Chart
Not applicable.
I. Material Interchangeability
Physical and Functional interchangeability are not affected by this Service Bulletin.
J. Material Disposition
Not Applicable.
K. Material Reidentification
None.
L. References
None.
PAGE 3 of 5

LM2500-IND-0176
August 28, 2003
M. Previous Modifications
None.
II. ACCOMPLISHMENT INSTRUCTIONS
NOTE
Implementation of the software block change cannot be accomplished and tracked
against a gas turbine serial number. Tracking of the implementation of the software
block change must be against a specific package identification number.
A. This Service Bulletin involves a software change only. For additional information,
contact your GE Energy Services Account Manager or GE Customer Satisfaction
Manager.
III. COMPLIANCE RECORD
Not Applicable. This Service Bulletin is for information only. It will not be tracked against
an Engine Serial Number.
PAGE 4 of 5

LM2500-IND-0176
August 28, 2003
Introduction of EABAL Software Change (LM2500+ DLE Models)
PAGE 5 of 5

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OPTIONAL

The information contained in this document is GE proprietary information and is disclosed in

Copyright (2003) General Electric Company, U.S.A.

SUBJECT: Introduction of EABAL Software Change (LM2500+ DLE Models)

(1) PRODUCTS: LM2500+ DLE Models

(2) ENGINE SERIAL NUMBERS:

LM2500+ gas turbines, serial numbers 559-051, 559-052, 559-101 through

LM2500+ gas generators, serial numbers 636-050, 636-051, 636-101 through

The primary objective of this software update is to provide newly available

This product has been developed as part of GE’s ongoing efforts to

Category: Optional (O) Level: Field (F) Timing Code: 7

GE recommends this Service Bulletin be accomplished at the customer’s option.

Approximately 1 man-hour is required to accomplish this Service Bulletin.

No special tools are required.

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.

This Service Bulletin involves a software change only. For additional

GE Marine & Industrial Aeroderivative Gas Turbines

Attn: GE Customer Account Manager

H. Material Configuration Chart

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.

II. ACCOMPLISHMENT INSTRUCTIONS

III. COMPLIANCE RECORD

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.

Introduction of EABAL Software Change (LM2500+ DLE Models)

GE PROPRIETARY INFORMATION - Subject to the restrictions on the cover or first page.

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